From c3f90123955539c5b1dbde1c1440d3d3fe8f62c5 Mon Sep 17 00:00:00 2001
From: Christopher Arndt <chris@chrisarndt.de>
Date: Sat, 2 Dec 2023 20:58:00 +0100
Subject: [PATCH] Initial commit (day 01)

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>
---
 day_01/input_01.txt     | 1000 +++++++++++++++++++++++++++++++++++++++
 day_01/solution_01.nim  |   12 +
 day_01/solution_01b.nim |   20 +
 3 files changed, 1032 insertions(+)
 create mode 100644 day_01/input_01.txt
 create mode 100644 day_01/solution_01.nim
 create mode 100644 day_01/solution_01b.nim

diff --git a/day_01/input_01.txt b/day_01/input_01.txt
new file mode 100644
index 0000000..9569bb5
--- /dev/null
+++ b/day_01/input_01.txt
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diff --git a/day_01/solution_01.nim b/day_01/solution_01.nim
new file mode 100644
index 0000000..8d35725
--- /dev/null
+++ b/day_01/solution_01.nim
@@ -0,0 +1,12 @@
+import std/[re, strutils]
+
+var res = 0
+
+for line in readFile("input_01.txt").splitLines:
+    if line.strip.len > 0:
+        var digits = findAll(line, re"\d")
+        var number = parseInt(digits[0] & digits[^1])
+        res += number
+        #echo $digits, $number
+
+echo "Result: ", $res
diff --git a/day_01/solution_01b.nim b/day_01/solution_01b.nim
new file mode 100644
index 0000000..67adf97
--- /dev/null
+++ b/day_01/solution_01b.nim
@@ -0,0 +1,20 @@
+import std/[re, strutils]
+
+var res = 0
+var valid_digits = "one,two,three,four,five,six,seven,eight,nine".split(",")
+var digits_rx = re("\\d|" & valid_digits.join("|"))
+
+proc parseDigit(s: string): int =
+    try:
+        result = parseInt(s)
+    except ValueError:
+        result = valid_digits.find(s) + 1
+
+for line in readFile("input_01.txt").splitLines:
+    if line.strip.len > 0:
+        var digits = findAll(line, digits_rx)
+        var number = parseDigit(digits[0]) * 10 + parseDigit(digits[^1])
+        res += number
+        #echo $digits, $number
+
+echo "Result: ", $res